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Biol Bull 102: 25-29. (February 1952)
© 1952 Marine Biological Laboratory
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THE COMPARATIVE EFFECTS OF FISH AND BEEF PITUITARY ON RETENTION OF WATER BY FROGS

EDGAR A. LAZO-WASEM 1 and GEORGE F. WEISEL 1

1 Department of Zoology, Montana State University, Missoula, Montana

1. Frogs injected with fresh salmon pituitary, whole beef pituitary extract, or whole barracuda pituitary extract undergo a rapid increase in weight followed by a more prolonged phase of weight decrease to normal. Controls treated with fresh salmon brain, bovine or barracuda brain extracts, or with Ringer's solution alone do not exhibit weight changes outside the normal fluctuations.

2. A statistical analysis of weight changes induced by the teleost and beef pituitary extracts shows a highly significant difference between the two; the fish material causes a greater and more prolonged weight increase.

3. The greater potency of the fish material may be due to a difference in the concentration of the principles involved, or the principles may differ basically.






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Copyright © 1952 by the Marine Biological Laboratory.